Scrubbing machine



March 25 1924. 1 1,488,457

H. A. CRISP SCRUBBING MACHINE Filed Jan. 17 1921 2 She'eis-Sheet 1 i 42 4/ z l0 1 I 4 7 9 5 1.. I M7,: E 352% 4. I l 1 1 1: 1 I M 4 4 *1 i i 1': '7 1 I: I

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H. A. CRISP SCRUBBING MACHINE Filed Jan. 1'7 1921 2 Sheets-Shei 2 INVENTOR HAW/( V4 OP/SP ATTORNEY Patented Mar. 25, 1.924,!

UNITED STATES PATENT QFFICE.

HARRY A. CRISP, OF ST. LOUIS, MISSOURI, ASSIGNOR TO EDITH WEAVER CRISP, OF

S'I. LOUIS, MISSOURI.

SGRUBBING MACHINE.

Application filed January 17, 1921. Serial No. 437,945.

To all whom it may concern.-

Be it known that I, HARRY A. CRIsr, a citizen of the United States, residing at the city of St. Louis and State of Missouri, have 6 invented a new and useful Scrubbing Machine, of which the following is a specification.

This invention relates to improvements in scrubbing and polishing machines, and con- 10 sists in the novel construction hereinafter disclosed.

An object of the invention is to provide a machine adapted to automatically scrub or polish a plane surface by the movement of 6 the machine across the same, with provision whereby a cleansing fluid compound may be automatically fed to the cleansing element.

Additional advantages will appear from the following description taken in connection with the accompanying drawings, in

which-'- Fig. 1 is a plan view. 4

Fig. 2 is a side elevation with portions broken away to more clearly illustrate the 35 construction.

Fig. 3 is a verticalsection through the machine.

Fig. 4. is an end elevation. In the embodiment of the invention illustrated in the drawing the frame of the machine is shown as made up of side plates 1 held together and supported by suitable stay rods 2. Pivotally attached to the rear of the frame of the machine is a yoke 3 from 35 which a handle 4 extends providing means for manually moving the machine. The frame of the machine is supported by rollers 5 near thc'iorward end thereof, said rollers being vertically adjustable in order to elevate or depress the bottom of the machine.

For this purpose the rollers are mounted on an arm 6 pivoted at 7 said arm 6 having a lug 8. A thumb screw 9 is mounted in a lug 10 carried by the side member of'the frame. 45 This construction permits the adjustment of the position of the roller 5 with respect to the bottom of the frame of the machine.

The rear end of. the machine is supported by a roller 11 carried in a bracket 12 supported on a shaft 13. The shaft 13 carries at one end an angle arm 14 that extends over a thumb screw 15 supported in a lug 16. This construction provides means for adj usting the elevation of the rear end of the frame 55 of the machine.

Within the frame and arranged to traverse the space at the bottom of the machine is a belt 17. The belt. 17 is mounted over rollers 18 and 19 revolubly supportedtrans versely of the frame of the machine and near the bottom thereof. The upper part of the belt is carried over a guide. roller 20 likewise transversely supported in the frame of the machine. The belt 17 extends under another roller 21, the roller 21 being supported in brackets 22 adjustably carried in lugs 23 mounted on the outer face of the side members of the frame. The roller 21 constitutes a tensioning device to hold the belt tight so that it will at all times present a continuous smooth surface within the cleansing and polishing area at the bottom of the machine.

The belt 17 extends over a power driven roller 24. The roller 24-. performs the double function of moving the belt 17 and of constituting one element of a wringer structure for wringing the belt. An adjustable wringer roll 25 is supported in vertically movable bearings 26.

A tensioning device includes bell crank levers 27 pivoted on the side members of the frame of the machine, having one arm thereof adapted to bear against the bearings 26 and the other arm connected with a cross member 28. A spring 29 is attached at one end to the cross member 28 and at the other end to some permanent part of the frame, in the embodiment shown to one of the stay rods 2. The spring 29 normally tends to hold the arm of the bell crank lever 27 against the bearings 26 for the roller 25 thereby placing tension on the roller for wringing the belt 17. The tensioning device includes means for releasing the tension on the roller 25, a pawl 30 attached to the cross member 28 being provided for this purpose. The pawl 30 has a detent at its lower end which latches over the edge of a portion of the frame of the machine. When the pawl 30 is in latched position the bell crank levers 27 are carried to the position shown in dotted lines in Fig. 2, thereby releasing the tension on the roller 25.

\Vhen the wringer device is adjusted for wringing operations the liquid is squeezed from the belt 17 and is discharged into a an 31 located transversely of the machine and within the folds of the belt.

The roller 24 is rotated to actuate the belt by a motor M carried by a support 32 dieposed transversely of the frame of the machine and preferably near the front end thereof. A power shaft 33 is revolubly mounted transversely of the frame ofthe machine and adjacent to the power shaft 34 of the motor. The power shaft 33 is driven by a worm drive connection 35 from the motor shaft 34. The power shaft 33 carries a sprocket 36 at one end, and the shaft on the roller 24 carries a sprocket 37. A sprocket chain 38 transmits the power from the shaft 33 to the shaft of the roller 24.

The opposite end of thevshaft 33 is equipped with a pulley 39 from which a pump 40 is driven from a pulley 41 by a belt connection 42. The pump 40 is connected into the pan 31 at one side thereof and serves to withdraw the liquid discharged into the pan, the pump 40 discharging into the waste liquid conduit 43.

The handle 4 of the machine is hollow.

and the electric circuitleads 44 lead from the motor and are encased within the handle. Near the end of the handle is a switch 45 for controlling the motor.

At the back of the machine is a trough 46, the lower wall of the trough 46 having a curved extension 47 terminating adjacent to the vertical stretch ofbelt between the rollers 18 and 24.

A liquid conduit or tube 48 extends through the handle of the machine and discharges into the trough 46.; The upper end of the liquid conduit is designed for connection with a flexible hose so that liquid may be supplied thereto from a remote source. In the conduit 48 is a valve 49 for controlling the passage of the liquid through the conduit.

' It will be observed that the water entering the trough discharges therefrom and is deflected against the vertical stretch of belt between the rollers 18 and 24, thus providing a continuous source of fresh liquid to the belt as the belt is rotated.

In order -to introduce into the liquid a cleansing compoundor to supply to the belt a polishing ingredient a hopper 50 is provided,

said hopper having inclined walls at thebottom of which is an opening discharging .against the extension 47 of the bottom wall of the trough 46. The hopper v5O is provided with a feed roller 51'that operates to feed measured quantities of the material placed in the hopper. The roller 51 is provided with a pulley 52 that is driven by a belt 53 operating over a roller 54 supported in a pivoted arm 55, the arm 55 being pivoted to the frame of the machine. The roller 54 is adapted to be raised and lowered so as to bring it into and out of contact with the surface over which the machine is moved.

A spring latch 56 operating over the edge of the frame of the machine provides means for holding the roller in elevated position thus providing ready means foradjusti'ngthe hopper feed device,

From the foregoing it will be understood that the operation of the machine is as- When the'machine is used for cleansing floor surfaces, the liquid conduit is opened and cleansing compound when 5 follows required is introduced into the liquid as-it flows against the vertical section of "the belt. he belt is thencarried around the rollers by the power mechanism and the machine moved across the surface upon which it is to be operated. 'The continuousmovement of the belt cleanses the surface carried around the rollers by, the wringing device the'dirty liquid is and as the belt is squeezed from belt and'i's discharged'into the pan of the machine, from whence it is-withdrawn by the pump construction.

If the machine is used as a polishing machine the liquid supply is cut off and a polishing ingredient is fed against/the belt so as to cover the surface thereof, and isthen carried to the surface operated on by the continuous movement of the belt. The incidental features of the machine such as adjustments are clear from the specification and do not require repetition.

I am aware that the invention may be modified in numerous particulars without departure from the spirit and scope thereof. I do not limit myself, therefore, to the exact details of construction and arrangement,

but what-I claim and desire to secure by Letters Patent, is

1. In a machine of the character described, aframe having an open. bottom, a pair of rollers supported on horizontal axes near the lower part of the frame and extending below the frame, an endless belt supported by said rollers for movement in the frame to traverse the open space at the bottom thereof, mechanism for operating said belt, means for discharging liquid against said belt, a feed device for feeding material to the liquid, rollers for supporting said frame, and means for holding said supporting rollers in different adjusted lpol ers .sitions to permit said first-named ro to prem said belt against a floor.

2. In a machine of the character described, a frame having an open bottom, a pair of rollers supported onhorizontal axes l e I near the bottom of the frame and extending below the frame, an endless belt passing under said rollers for movement along the open space at the bottom of the frame, mechanism for operating and wringing said belt. means for discharging liquid against said belt beyond said mechanism, a feed device for feeding material to the liquid, a power device for actuating said mechanism, and means for supporting said frame at different altitudes above the floor to permit said rollers to press said belt against a floor or not as desired.

3. In a machine of the character described, a frame having an open bottom, an endless belt supported to move in the frame and to traverse the open space at the bottom thereof, a liquid passage discharging against the belt, a hopper, a feed device in the hopper for feeding material to the liquid, and power mechanism for operating the feed device.

4. In a. machine of the character described, a frame havin an 0 en bottom, an endless belt supporte in t e frame arranged to traverse the open space at the bottom thereof, mechanism for operating said belt, means for discharging liquid against said belt, a feed device for feeding material to the liquid, :1 power device for actuating said feed device, and means for rendering said power device operative and inoperative whereb be operated or rendered idle as desired.

- In a machine of the character described, a frame having an open bottom, an endless belt supported in the frame arranged to traverse the open space at the bottom thereof, mechanism for operatin said belt, means for discharging liquid against said belt, a feed device for feeding material to the liquid, a power device for actuating said feed device, means for rendering said power device operative and inoperative whereby said feed device may be operated or rendered idle as desired, and a latch device for holding the power device in operative adjustment.

HARRY A. CRISP.

said feed device may, 

